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Fredrikssonite

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About FredrikssoniteHide

Kurt A. Fredriksson
Formula:
Mg2(Mn3+,Fe3+)(BO3)O2
Colour:
Reddish-brown
Lustre:
Vitreous
Hardness:
6
Crystal System:
Orthorhombic
Member of:
Name:
Named by P.J. Dunn, D.R. Peacor, W.B. Simmons, and D. Newbury in 1983 in honor of Kurt A. Fredriksson (1926, Sweden – 2001), Swedish–American geochemist and meteoriticist, Smithsonian Institution, Washington, D.C., USA. He pioneered the use of the electron microprobe on extraterrestrial minerals.
This page provides mineralogical data about Fredrikssonite.


Classification of FredrikssoniteHide

Approved
Approval Year:
1983
First Published:
1983
6.AB.30

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
24.2.1.6

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.8.3

9 : Borates
8 : Borates of Fe

Physical Properties of FredrikssoniteHide

Vitreous
Colour:
Reddish-brown
Hardness:
Cleavage:
Poor/Indistinct

Optical Data of FredrikssoniteHide

Type:
Biaxial (+)
RI values:
nα = 1.820 nβ = 1.860 nγ = 1.990
2V:
Measured: 51° , Calculated: 62°
Max Birefringence:
δ = 0.170
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
small

Chemical Properties of FredrikssoniteHide

Formula:
Mg2(Mn3+,Fe3+)(BO3)O2
IMA Formula:
Mg2Mn3+O2(BO3)

Crystallography of FredrikssoniteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 9.18 Å, b = 12.55 Å, c = 2.95 Å
Ratio:
a:b:c = 0.731 : 1 : 0.235
Unit Cell V:
339.87 ų (Calculated from Unit Cell)

Type Occurrence of FredrikssoniteHide

Place of Conservation of Type Material:
Smithsonian Institution, catalogue numbers 149811 and 150341.
Associated Minerals at Type Locality:

Synonyms of FredrikssoniteHide

Other Language Names for FredrikssoniteHide

Relationship of Fredrikssonite to other SpeciesHide

Member of:
Other Members of this group:
Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
BonaccorditeNi2Fe3+(BO3)O2Orth.
LudwigiteMg2Fe3+(BO3)O2Orth.
VonseniteFe2+2Fe3+(BO3)O2Orth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Hausmannite3 photos of Fredrikssonite associated with Hausmannite on mindat.org.
Kinoshitalite2 photos of Fredrikssonite associated with Kinoshitalite on mindat.org.
Zenzénite1 photo of Fredrikssonite associated with Zenzénite on mindat.org.
Calcite1 photo of Fredrikssonite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.AB.05HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m : P63/m
6.AB.20Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)Orth.
6.AB.20YuanfuliiteMg(Fe3+,Al)O(BO3)Orth.
6.AB.25KarliteMg7(BO3)3(OH,Cl)5Orth.
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
6.AB.30BonaccorditeNi2Fe3+(BO3)O2Orth.
6.AB.30LudwigiteMg2Fe3+(BO3)O2Orth.
6.AB.30VonseniteFe2+2Fe3+(BO3)O2Orth.
6.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
6.AB.40BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AB.40ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
6.AB.45Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2Mon.
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
6.AB.50FluoboriteMg3(BO3)(F,OH)3Hex.
6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m : P63/m
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3Hex.
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth. mm2 : Pna21
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth. mmm (2/m 2/m 2/m) : Pmna
6.AB.85PainiteCaZrAl9(BO3)O15Hex.

Related Minerals - Dana Grouping (8th Ed.)Hide

24.2.1.1LudwigiteMg2Fe3+(BO3)O2Orth.
24.2.1.2VonseniteFe2+2Fe3+(BO3)O2Orth.
24.2.1.3Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
24.2.1.4BonaccorditeNi2Fe3+(BO3)O2Orth.
24.2.1.5ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.8.1VonseniteFe2+2Fe3+(BO3)O2Orth.
9.8.2LudwigiteMg2Fe3+(BO3)O2Orth.
9.8.4ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FredrikssoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P.J., Peacor, D.R., Simmons, W.B., Newbury, D. (1983) Fredrikssonite, a new member of the pinakiolite group, from Långban, Sweden. Geologiska Föreningens i Stockholm Förhandlingar: 105: 335-340.
Dunn, P.J., Chao, G.Y., Fitzpatrick, J.J., Langley, R.H., Fleischer, M., Zilczer, J.A. (1986) New mineral names. American Mineralogist: 71: 227-232.
Burns, P.C., Cooper, M.A., Hawthorne, F.C. (1994) Jahn–Teller-distorted Mn3+O6 octahedra in fredrikssonite, the fourth polymorph of Mg2Mn3+(BO3)O2. The Canadian Mineralogist 32, 397-403.
Cooper, M.A., Hawthorne, F.C. (1998) The crystal structure of blatterite, Sb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32, and structural hierarchy in Mn3+-bearing zigzag borates. The Canadian Mineralogist: 36: 1171-1193.
Grew, E.S., Anovitz, L.M. (2002) BORON: Mineralogy, Petrology and Geochemistry, second edition.
Frost, R.L. (2011) Raman spectroscopy of selected borate minerals of the pinakiolité group. Journal of Raman Spectroscopy: 42: 540-543.

Internet Links for FredrikssoniteHide

Localities for FredrikssoniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Sweden (TL)
 
  • Värmland
    • Filipstad
GFF (1983) 105, 335-340; P. Dunn; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
      • Nordmark district
        • Jakobsberg ore field
K.Gatedal
Mineral and/or Locality  
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